CN111307402B - Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section - Google Patents
Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section Download PDFInfo
- Publication number
- CN111307402B CN111307402B CN202010309994.0A CN202010309994A CN111307402B CN 111307402 B CN111307402 B CN 111307402B CN 202010309994 A CN202010309994 A CN 202010309994A CN 111307402 B CN111307402 B CN 111307402B
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- pipe section
- vacuum pipe
- rotating shaft
- wind tunnel
- mounting seat
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- 239000002893 slag Substances 0.000 title claims abstract description 44
- 239000000428 dust Substances 0.000 claims description 28
- 238000009434 installation Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000035939 shock Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a fishbone type diaphragm slag crushing baffle arranged on a vacuum pipe section of a pulse wind tunnel. The fishbone type diaphragm slag crushing baffle consists of a front group of blades and a rear group of blades which are arranged in a staggered manner and can rotate around a rotating shaft, and the fishbone type diaphragm slag crushing baffle is arranged at the closed end of a vacuum tube of a wind tunnel. When the diaphragm slag or the flap falls in the test air flow in the wind tunnel test, the diaphragm slag or the flap which moves at high speed impacts on the blades, and the blades can rotate along the rotating shaft under the acting force of the diaphragm slag or the flap, so that the impact of the diaphragm slag or the flap on the blades is reduced, the kinetic energy of the diaphragm slag or the flap is reduced, and the damage of the diaphragm slag or the flap to the closed end of the vacuum tube is avoided. The fishbone type diaphragm slag baffle plate arranged on the vacuum pipe section of the pulse wind tunnel has a simple and reliable structure, does not need operation and resetting of staff, and can effectively prevent diaphragm slag or valve falling from damaging the closed end of the vacuum pipe.
Description
Technical Field
The invention belongs to the field of wind tunnel equipment, and relates to a fishbone type diaphragm slag crushing baffle arranged on a pulse wind tunnel vacuum pipe section.
Background
In pulse equipment such as shock tunnels and the like, diaphragms are generally used for separating different sections of the tunnels, when wind tunnel tests are carried out, gas with different pressures is respectively filled in pipe bodies at two sides of the diaphragms, after the diaphragms are broken under the action of high-pressure gas, shock waves are generated at the diaphragms, test gas in a low-pressure section is compressed by the shock waves to form high-temperature high-pressure test gas, and after the test gas breaks through the diaphragms at the tail ends of the low-pressure section, the test gas enters a spray pipe to expand to form test gas flow.
The diaphragm of impulse wind tunnel such as shock tunnel is generally made of metal or polyester fiber material. During the process of tearing by high-pressure air flow, the metal diaphragm may generate slag and larger valve drop. The polyester fiber is vaporized after being melted at high temperature, but has the problem of incomplete vaporization, and film slag is also generated. These debris or flaps arrive at the vacuum tube section with high velocity air flow, which is liable to damage the vacuum tube section when striking the closed end of the vacuum tube due to the high velocity of the debris or flaps.
In the us LENS II shock tunnel, m.s. Holden, j. Harvey, m.maclean et al, publication "Development and Application of a New Ground Test Capability to Conduct Full-Scale Shroud and Stage Separation Studies at Duplicated Flight Conditions" (AIAA 2005-696), a centerbody valve is designed between the driven section and throat of the tunnel to prevent debris or flaps of the diaphragm from entering the vacuum tube section, which centerbody valve prevents high pressure driving gas from entering the vacuum tube section while also avoiding debris or flaps of the diaphragm from entering the vacuum tube section, which is disadvantageous in that the flow field setup time is prolonged, which in practice results in a loss of effective operating time of the tunnel for short-run tunnels.
Currently, there is a need to develop a dedicated diaphragm slag damper for pulse wind tunnels.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fishbone type diaphragm slag crushing baffle arranged on a vacuum pipe section of a pulse wind tunnel.
The invention relates to a fishbone type diaphragm slag-crushing baffle arranged on a vacuum pipe section of a pulse wind tunnel, which is characterized by comprising a dust baffle, a rotating shaft and a limiting cylinder;
the vacuum pipe section is fixedly supported on the ground through a serial base, the vacuum pipe section is a circular pipe with one end open and the other end closed, and the open end is connected with the downstream end of the pulse wind tunnel test section; a front mounting seat and a rear mounting seat which are fixed at the lowest part of the lower wall surface of the vacuum pipe section are arranged in the vacuum pipe section at positions corresponding to the base, and a corresponding front mounting seat and a corresponding rear mounting seat are arranged at the highest part of the upper wall surface of the vacuum pipe section;
the rotating shaft is two vertically placed cylinders, two ends of one cylinder are respectively inserted into the upper wall surface mounting seat and the corresponding lower wall surface mounting seat which are positioned at the upstream, and two ends of the other cylinder are respectively inserted into the upper wall surface mounting seat and the corresponding lower wall surface mounting seat which are positioned at the downstream;
the center of the dust baffle is provided with a sleeve, the height of the sleeve is H, two symmetrical blades are arranged on the sleeve, the included angle range between the two blades is 90-150 degrees, and the length of the blades is slightly smaller than the horizontal length of the vacuum pipe section corresponding to the installation height of the blades;
the limiting cylinder is a circular tube with bosses at two ends, and the height of the limiting cylinder is H;
the dust baffle and the limiting cylinder are arranged on the same rotating shaft in a vertically staggered manner; the dust baffle and the limiting cylinder are installed on the two rotating shafts in an up-and-down staggered mode, namely, the dust baffle installed on the upstream rotating shaft corresponds to the limiting cylinder installed on the downstream rotating shaft.
The thrust bearing is arranged at the lower part in the sleeve of the dust baffle.
The upper end and the lower end of the rotating shaft are fixed on the mounting seat through an upper mounting block and a lower mounting block respectively; the mounting block is a flat plate, and a through hole assembled with the threaded hole of the mounting seat is formed in the flat plate; each group of mounting blocks is provided with two blocks, one side end of one mounting block is provided with a semicircular groove I matched with the rotating shaft, the corresponding side end of the other mounting block is provided with a semicircular groove II matched with the rotating shaft, and after one group of mounting blocks is assembled, the semicircular groove I and the semicircular groove II are combined into a round hole surrounding the rotating shaft; the installation block is fixed on the installation seat through bolts.
The mounting seat is welded at the lowest point of the inner wall surface of the vacuum pipe section.
The invention has a plurality of groups of dust baffle plates arranged in the fishbone type diaphragm slag crushing baffle plate of the pulse wind tunnel vacuum pipe section, and the difference is the length of the blade; the dust plates are arranged on the rotating shaft according to the sequence of long middle and short two ends, and a limiting cylinder is arranged between the two dust plates to keep a certain distance; a thrust bearing is arranged at the lower part in the sleeve of each dust baffle; after the dust plate is installed, a gap is reserved between the dust plate and the wall surface of the vacuum pipe section.
The fishbone type diaphragm slag crushing baffle plate arranged on the vacuum pipe section of the pulse wind tunnel consists of a front group of dust baffle plates and a rear group of dust baffle plates, wherein the positions of blades and gaps of the front group of dust baffle plates and the rear group of dust baffle plates are opposite, and the blades just cover the cross section of the whole vacuum pipe section when seen from front to back along the airflow direction.
According to the invention, the blades in the fishbone type diaphragm slag baffle plate arranged on the vacuum pipe section of the pulse wind tunnel can rotate around the rotating shaft under the action of slag, so that the impact of diaphragm slag or falling leaves on the blades is reduced.
The fishbone type diaphragm slag baffle arranged on the pulse wind tunnel vacuum pipe section can prevent slag or valve falling of the wind tunnel diaphragm, and damage of the slag or the valve falling of the wind tunnel diaphragm to the closed end of the vacuum pipe is avoided.
Drawings
FIG. 1 is a schematic perspective view of a fishbone type diaphragm slag baffle of the invention mounted in a vacuum tube section of a pulse wind tunnel in a vacuum tube section;
FIG. 2 is a rear, lower view, taken along a horizontal plane, of a fishbone diaphragm slag baffle of the present invention mounted in a pulse tunnel vacuum tube segment;
FIG. 3 is a view along the direction of air flow of a fishbone diaphragm slag baffle of the invention mounted in a pulse tunnel vacuum tube segment;
FIG. 4 is a perspective view of a vacuum tube segment of the present invention mounted in a fishbone diaphragm slag guard of a pulse wind tunnel vacuum tube segment;
FIG. 5 is a perspective view of a blade of the present invention mounted in a fishbone diaphragm slag guard of a pulse tunnel vacuum tube segment;
FIG. 6 is a perspective view of a limiting cylinder of the invention mounted in a fishbone diaphragm slag damper of a pulse wind tunnel vacuum tube segment;
fig. 7 is a perspective view of a mounting block of the invention mounted in a fishbone diaphragm slag guard of a pulse tunnel vacuum tube segment.
In the figure, 1 a dust baffle, 2 a rotating shaft, 3 a limiting cylinder, 4 a mounting block, 5 a vacuum pipe section, 6 a base, 7 a blade, 8 a sleeve, 9 a mounting seat, 10 a boss and 11 a through hole.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
As shown in fig. 1 to 4, the fishbone type diaphragm slag baffle installed on the vacuum pipe section of the pulse wind tunnel comprises a dust baffle 1, a rotating shaft 2 and a limiting cylinder 3;
the vacuum pipe section 5 is fixedly supported on the ground through a serial base 6, the vacuum pipe section 5 is a circular pipe with one end open and the other end closed, and the open end is connected with the downstream end of the pulse wind tunnel test section; a front mounting seat and a rear mounting seat 9 fixed at the lowest part of the lower wall surface of the vacuum pipe section 5 are arranged in the vacuum pipe section 5 at positions corresponding to the base 6, and the corresponding front mounting seat and rear mounting seat 9 are arranged at the highest part of the upper wall surface of the vacuum pipe section 5;
the rotating shaft 2 is two vertically placed cylinders, two ends of one cylinder are respectively inserted into an upper wall surface mounting seat 9 and a corresponding lower wall surface mounting seat 9 which are positioned at the upstream, and two ends of the other cylinder are respectively inserted into an upper wall surface mounting seat 9 and a corresponding lower wall surface mounting seat 9 which are positioned at the downstream;
the center of the dust plate 1 is provided with a sleeve 8 as shown in fig. 5, the height of the sleeve 8 is H, two symmetrical blades 7 are arranged on the sleeve 8, the included angle range between the two blades 7 is 90-150 degrees, and the length of each blade 7 is slightly smaller than the horizontal length of a vacuum pipe section 5 corresponding to the installation height of each blade 7;
as shown in fig. 6, the limiting cylinder 3 is a circular tube with bosses 10 at two ends, and the height of the limiting cylinder 3 is also H;
the dust baffle 1 and the limit cylinder 3 are arranged on the same rotating shaft 2 in a vertically staggered manner; the dust plate 1 and the limiting cylinder 3 are installed on the two rotating shafts 2 in an up-and-down staggered mode, namely, the dust plate 1 installed on the upstream rotating shaft 2 corresponds to the limiting cylinder 3 installed on the downstream rotating shaft 2.
The thrust bearing is arranged at the lower part in the sleeve 8 of the dust board 1.
The upper end and the lower end of the rotating shaft 2 are respectively fixed on a mounting seat 9 through an upper group of mounting blocks 4 and a lower group of mounting blocks 4 shown in fig. 7; the mounting block 4 is a flat plate, and a through hole 11 which is assembled with a threaded hole of the mounting seat 9 is formed in the flat plate; each group of mounting blocks 4 is provided with two blocks, one side end of one mounting block 4 is provided with a semicircular groove I matched with the rotating shaft 2, the corresponding side end of the other mounting block 4 is provided with a semicircular groove II matched with the rotating shaft 2, and after one group of mounting blocks 4 is assembled, the semicircular groove I and the semicircular groove II are combined into a round hole surrounding the rotating shaft 2; the mounting block 4 is fixed on the mounting seat 9 by bolts.
The mounting seat 9 is welded at the lowest point of the inner wall surface of the vacuum pipe section 5.
Example 1:
the fishbone type diaphragm slag crushing baffle installed on the vacuum pipe section of the pulse wind tunnel in the embodiment is installed in the vacuum pipe section 5 of the order of 4 meters.
When in wind tunnel test, when diaphragm slag or valve falling exists in test air flow, the diaphragm slag or valve falling which moves at high speed impacts on the blades 7, and under the acting force of the diaphragm slag or valve falling, the blades 7 can rotate along the rotating shaft 2, so that the impact of the diaphragm slag or valve falling on the blades 7 is reduced, the kinetic energy of the diaphragm slag or valve falling is reduced, and the damage of the diaphragm slag or valve falling to the closed end of the vacuum tube is avoided.
Claims (4)
1. The fishbone type diaphragm slag-crushing baffle plate is arranged on the vacuum pipe section of the pulse wind tunnel and is characterized by comprising a dust-blocking plate (1), a rotating shaft (2) and a limiting cylinder (3);
the vacuum pipe section (5) is fixedly supported on the ground through a serial base (6), the vacuum pipe section (5) is a circular pipe with one end open and the other end closed, and the open end is connected with the downstream end of the pulse wind tunnel test section; a front mounting seat and a rear mounting seat (9) fixed at the lowest part of the lower wall surface of the vacuum pipe section (5) are arranged in the vacuum pipe section (5) at positions corresponding to the base (6), and the corresponding front mounting seat and the corresponding rear mounting seat (9) are arranged at the highest part of the upper wall surface of the vacuum pipe section (5);
the rotating shaft (2) is two vertically placed cylinders, two ends of one cylinder are respectively inserted into an upper wall surface mounting seat (9) and a corresponding lower wall surface mounting seat (9) which are positioned at the upstream, and two ends of the other cylinder are respectively inserted into an upper wall surface mounting seat (9) and a corresponding lower wall surface mounting seat (9) which are positioned at the downstream;
the center of the dust baffle (1) is provided with a sleeve (8), the height of the sleeve (8) is H, two symmetrical blades (7) are arranged on the sleeve (8), the included angle range between the two blades (7) is 90-150 degrees, and the length of the blades (7) is slightly smaller than the horizontal length of the vacuum pipe section (5) corresponding to the installation height of the blades (7);
the limiting cylinder (3) is a circular tube with bosses (10) at two ends, and the height of the limiting cylinder (3) is H;
the dust baffle (1) and the limit cylinder (3) are arranged on the same rotating shaft (2) in a vertically staggered way; the dust plate (1) and the limiting cylinder (3) are installed on the two rotating shafts (2) in an up-and-down staggered mode, namely, the dust plate (1) installed on the upstream rotating shaft (2) corresponds to the limiting cylinder (3) installed on the downstream rotating shaft (2).
2. The fishbone type diaphragm slag baffle installed on the vacuum tube section of the pulse wind tunnel according to claim 1, wherein a thrust bearing is installed at the inner lower part of the sleeve (8) of the dust baffle (1).
3. The fishbone type diaphragm slag baffle installed on the vacuum pipe section of the pulse wind tunnel according to claim 1, wherein the upper end and the lower end of the rotating shaft (2) are respectively fixed on the installation seat (9) through an upper installation block (4) and a lower installation block (4); the mounting block (4) is a flat plate, and a through hole (11) which is assembled with a threaded hole of the mounting seat (9) is formed in the flat plate; each group of mounting blocks (4) is provided with two blocks, one side end of one mounting block (4) is provided with a semicircular groove I matched with the rotating shaft (2), the corresponding side end of the other mounting block (4) is provided with a semicircular groove II matched with the rotating shaft (2), and after the mounting blocks (4) are assembled, the semicircular groove I and the semicircular groove II are combined into a round hole surrounding the rotating shaft (2); the mounting block (4) is fixed on the mounting seat (9) through bolts.
4. The fishbone type diaphragm slag baffle installed on the vacuum tube section of the pulse wind tunnel according to claim 1, wherein the installation seat (9) is welded at the lowest point of the inner wall surface of the vacuum tube section (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309994.0A CN111307402B (en) | 2020-04-20 | 2020-04-20 | Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309994.0A CN111307402B (en) | 2020-04-20 | 2020-04-20 | Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111307402A CN111307402A (en) | 2020-06-19 |
| CN111307402B true CN111307402B (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010309994.0A Active CN111307402B (en) | 2020-04-20 | 2020-04-20 | Fishbone type diaphragm slag crushing baffle installed on pulse wind tunnel vacuum pipe section |
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| Country | Link |
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| CN (1) | CN111307402B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229595B (en) * | 2020-11-06 | 2024-05-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Device and method for improving local vacuum degree of pulse wind tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029017A (en) * | 2014-06-24 | 2014-09-10 | 四川省工业设备安装公司 | Wind tunnel flow deflector forming device |
| CN105444979A (en) * | 2015-08-21 | 2016-03-30 | 中国人民解放军国防科学技术大学 | Array diaphragm pressure releasing type wind tunnel experiment cabin |
| CN205228769U (en) * | 2015-12-11 | 2016-05-11 | 中国航天空气动力技术研究院 | A featheredge metallic diaphragm for jumbo size pulse wind -tunnel |
| CN106644359A (en) * | 2016-12-07 | 2017-05-10 | 中国航天空气动力技术研究院 | Film clamping device for double-film pressure-fixed film breaking and single-film impact film breaking |
| CN111307403A (en) * | 2020-04-20 | 2020-06-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| CN211527771U (en) * | 2020-04-20 | 2020-09-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| CN211626869U (en) * | 2020-04-20 | 2020-10-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fishbone type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
-
2020
- 2020-04-20 CN CN202010309994.0A patent/CN111307402B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104029017A (en) * | 2014-06-24 | 2014-09-10 | 四川省工业设备安装公司 | Wind tunnel flow deflector forming device |
| CN105444979A (en) * | 2015-08-21 | 2016-03-30 | 中国人民解放军国防科学技术大学 | Array diaphragm pressure releasing type wind tunnel experiment cabin |
| CN205228769U (en) * | 2015-12-11 | 2016-05-11 | 中国航天空气动力技术研究院 | A featheredge metallic diaphragm for jumbo size pulse wind -tunnel |
| CN106644359A (en) * | 2016-12-07 | 2017-05-10 | 中国航天空气动力技术研究院 | Film clamping device for double-film pressure-fixed film breaking and single-film impact film breaking |
| CN111307403A (en) * | 2020-04-20 | 2020-06-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| CN211527771U (en) * | 2020-04-20 | 2020-09-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | Plate-type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
| CN211626869U (en) * | 2020-04-20 | 2020-10-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | Fishbone type diaphragm slag breaking baffle plate installed in vacuum pipe section of pulse wind tunnel |
Non-Patent Citations (1)
| Title |
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| CN111307402A (en) | 2020-06-19 |
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